Mark Irwin Clifton (Oct 24, 1906–Oct 25, 1963) was an American science fiction writer, the co-winner of the second Hugo Award for best novel. He began publishing in May 1952 with the widely anthologized story "What Have I Done?". (From Wikipedia)
More about Mark Clifton:Books by Mark Clifton:
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Clifton, Mark, 1906-1963: Eight Keys to Eden (Garden City, NY: Doubleday and Co., 1960) (Gutenberg text and page images)
Additional books by Mark Clifton in the extended shelves:
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Clifton, Mark, 1906-1963: Hang head, vandal, illust. by Virgil Finlay (Gutenberg ebook)
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